ABSTRACT
Due to the spread of COVID-19, people are starting to be more aware and careful when touching any devices in the public. In this paper, we proposed a method that could help reduce physical contacts with public devices using smartphone. This method is called Chameleon and we have developed the Chameleon so that it functions as an application that can control any kinds of public devices with minimal modifications.To confirm the effectiveness of the Chameleon, we have applied the method to two different systems in the campus of Nagasaki University that is expected to be used by multiple users. The two systems are a Digital Signage System, a system that provides directions to campus visitors, and a PIN type Smart Lock, a system that acts as a door lock. © 2021 IEEE.